Whole class of Echinoderms. Maybe the inspiration of Lovecraft's Old Race, which colonized the Earth in its beginning, created the shoggoths, and from tissue left over from their creation, all earthly life evolved (basis for Ubbo-Sathla legend in book of Eibon).

Whole class of Echinoderms. Maybe the inspiration of Lovecraft's Old Race, which colonized the Eart